Prime Tech Pads Size Tables

Prime Tech Round and Square Outrigger Pads

Sizes & PSI/Load Ratings

Sizes / PSI / Loads for Prime Tech SQUARE Outrigger Pads in 1.5″

Thickness=1.5″ 250 PSI
Length in Inches (“)		 Pad Area
Square Inches		 Weight
US Pounds		 Number
Of Handles		 Capacity
Using 100%
of Area
in US pounds
250 PSI for
1.5″ Thickness		 Load Capacity
using 25% of area
less safety factor
for 1.5″ thickness
in US pounds
16 256 14 1 64,000 16,000
18 324 17 1 81,000 20,250
20 400 21 1 100,000 25,000
24 576 30 1 144,000 36,000
32 1,024 55 2 256,000 60,000
36 1,296 68 2 324,000 72,900
40 1,600 84 4 400,000 80,000
48 2,304 118 4 576,000 108,000
60 3,600 n/a n/a n/a n/a

Sizes / PSI / Loads for Prime Tech ROUND Outrigger Pads in 1.5″

Thickness=1.5″ 250 PSI
Length in Inches (“)		 Pad Area
Square Inches		 Weight
US Pounds		 Capacity
Using 100%
of Area
in US pounds
250 PSI for
1.5″ Thickness		 Load Capacity
using 25% of area
less safety factor
for 1.5″ thickness
in US pounds
16 201 11 50,265 12,566
18 254 13 63,617 15,904
20 314 16 78,540 19,635
24 452 23 113,097 28,274
32 804 43 201,062 47,752
36 1,018 53 254,469 57,256
40 1,257 66 314,159 62,832
48 1,810 92 452,389 84,823
60 n/a n/a n/a n/a

Sizes / PSI / Loads for Prime Tech SQUARE Outrigger Pads in 2.5″

Thickness=2.5″ 500 PSI
Length in Inches (“)		 Pad Area
Square Inches		 Weight
US Pounds		 Number
Of Handles		 Capacity
Using 100%
of Area
in US pounds
500 PSI for
2.5″ Thickness		 Load Capacity
using 25% of area
less safety factor
for 2.5″ thickness
in US pounds
16 256 23 1 128,000 32,000
18 324 28 1 162,000 40,500
20 400 35 1 200,000 47,500
24 576 49 1 288,000 64,800
32 1,024 91 2 512,000 98,560
36 1,296 108 2-4 648,000 113,400
40 1,600 139 4 800,000 122,00
48 2,304 196 4 1,152,000 149,760
60 3,600 315 4-8 1,800,000 216,000

Sizes / PSI / Loads for Prime Tech ROUND Outrigger Pads in 2.5″

Thickness=2.5″ 500 PSI
Length in Inches (“)		 Pad Area
Square Inches		 Weight
US Pounds		 Capacity
Using 100%
of Area
in US pounds
500 PSI for
2.5″ Thickness		 Load Capacity
using 25% of area
less safety factor
for 2.5″ thickness
in US pounds
16 201 18 100,531 25,133
18 254 22 127,235 31,809
20 314 27 157,080 37,306
24 452 38 226,195 50,894
32 804 71 402,124 77,409
36 1,018 84 508,938 89,064
40 1,257 108 628,319 95,819
48 1,810 153 904,779 122,145
60 2,827 246 1,413,717 169,646

Calculation of Load Capacity Explained

The charts above illustrate the specifications for light to medium outrigger pads with a thickness of 1.5 inches and medium to heavy-duty pads with a thickness of 2.5 inches. The capacity figures are derived by multiplying the PSI rating (either 250 or 500 PSI) by the pad’s surface area. This calculation yields a substantial number, representing the total load each pad can support when the load is evenly distributed across the entire pad. Given that most equipment utilizes four outriggers, this figure is divided by four.

Subsequently, a safety factor is applied based on the pad’s thickness and size to determine the actual load capacity for each pad specification. Our pad materials, Polystone and Densetec, exhibit PSI ratings ranging from 2600 to 2800 PSI. The factories employ complex calculations, conducted by experts in mathematics, physics, and chemistry, to determine the PSI per thickness.

How to Select the Correct Pad Size

To select the appropriate pad size, it is advisable to multiply the area of your outrigger foot, shoe, or plate by a minimum factor of 3, with a factor of 4 being preferable, to determine the necessary outrigger pad size. For instance, if your shoe size is an 18-inch round plate with an area of 254 square inches, multiplying 254 by 3 results in 762 square inches. This calculation indicates that you should choose a pad with an area of at least 762 square inches, such as a 32-inch square pad with an area of 1,024 square inches or a 32-inch round pad with an area of 804 square inches.

Subsequently, ensure that the selected pad also meets the load capacity requirements specified in the above table. It is crucial to accurately calculate the total lift weight, which includes the equipment, all accessories, the operator, and the lift load, and to select pads that provide sufficient area and load capacity to accommodate the total lift weight.

Additionally, consider the thickness of the pad, which depends on the total load and ground conditions. Assess whether the surface is gravel, rock, sand, concrete, or mud. The softer the ground, the thicker the pad should be. When uncertain, opting for thicker pads is the safer choice.

Just a quick note on round vs. square pads

Square pads have approximately 22% more surface area than round pads, which helps distribute the load more effectively. However, round pads offer greater convenience – they’re easier to handle and can be rolled rather than carried, making setup quicker and
simpler. To maintain the ease of using round pads while compensating for their smaller area, increasing their thickness can sometimes offset the difference in load capacity.

Here are a few explanations regarding our shipping procedures:

Shipping costs are determined by dimensional and actual weights, as well as density, and can vary significantly based on the recipient’s zip code.

We ensure the most competitive shipping rates at the time of your order by partnering with a freight broker who provides multiple carrier options. Please note that expedited shipping typically incurs higher costs.

Deliveries to residential addresses are more expensive than those to business addresses. Whenever possible, we arrange for shipping to a carrier’s depot, allowing you to pick up your order without additional charges.

For smaller packages, we utilize multiple boxes to minimize costs, as UPS and FedEx impose substantial surcharges on boxes exceeding 50 pounds.

Carriers apply significant surcharges for deliveries to military facilities and locations classified as “remote” rural areas.

For any questions or comments, please contact us by calling or texting 770-594-8608, or by emailing info@primetechincusa.com.